ive ordered a tikka t3x ctr in stainless 20 inch. an a vortex 6x24x50 hs-t 30 mm I'm gonna stay with the standard rail for now. havnt got my rings yet.. can i get by with low or med rings?. does vortex make a decent ring? i like to get it low as i can to the barrel an still clear.. any recommendations would be great.